These trackers are Bluetooth tags that communicate with one's smartphone, Stern explains. So long as you don't lose your phone, you'll always be able to locate the wallet, keys, or ID that you attach the tag to.

The communication range of the trackers are limited to somewhere between one hundred and one hundred and fifty feet. All three are relatively small devices, with the largest being the approximate size of a Wheat Thin. The devices give you indications on how close you are. Tile, reportedly provides text, while the Duet and TrackR show signal strength. Conversely, Duet and TrackR allow the user to set an alarm that will activate when the phone and device are disconnected. They all report when the device was last seen, which is often half the battle in relocating your lost goods.

Joanna states that the Tile is the best, due to lack of technical issues in plotting it's location on the in-app map. Glitches were apparent in both the Duet and TrackR in this feature, however the designers are working on the problem.

All three trackers came from successful crowd-funding campaigns and cost less than $25.